I.Eji akụrụngwa:
A na-eji ya maka ịlele permeability mmiri nke uwe nchebe ahụike, akwa mkpuchi dị iche iche, akwa ihe mejupụtara, ihe nkiri mejupụtara na ihe ndị ọzọ.
Ụkpụrụ Nzukọ II.
1.GB 19082-2009 -Ngwunye mkpuchi mkpuchi mkpuchi ahụike chọrọ teknụzụ chọrọ 5.4.2 mmiri permeability;
2.GB/T 12704-1991 — Usoro maka mkpebi nke mmiri permeability nke ákwà – Umi permeable iko usoro 6.1 Usoro A mmiri absorption usoro;
3.GB/T 12704.1-2009 - akwa akwa - Ule ule maka ikuku mmiri - Akụkụ 1: usoro ntinye mmiri;
4.GB/T 12704.2-2009 - akwa akwa - Ule ule maka ikuku mmiri - Nkebi 2: usoro evaporation;
5.ISO2528-2017 - Ihe mpempe akwụkwọ - Mkpebi nke ọnụego nnyefe mmiri vaport (WVTR) - Gravimetric (efere) usoro
6.ASTM E96; JIS L1099-2012 na ụkpụrụ ndị ọzọ.